Coal-crusher.



BATENTED DEC. 27, 1904. 1 G. W. PERRY.

GOAL GRUSHER. APPLIOA'I IOH FILED JUNE 15,1904.

' "(YE/I10}? @1901" a WPerry,

WITNESSES r ATTOHNEQ UNITED STATES Patented December 27, 1904.

PATENT OFFICE.

COAL-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 778,372, dated December27, 1904.

Application filed June 15,1904. Serial No, 212,615.

To all whom it may concern:

Be it known that I, GEORGE W. PERRY, a citizen of the United States,residing at Tuscarora, in the county of Schuylkill and State ofPennsylvania, have invented certain new and useful Improvements inCoal-Crushers, of which the following is aspecification, such as willenable those skilledin the art to which it appertains to make and usethe same.

The object of this invention is to provide a coal-cru sher involving theusual casing of any preferredconstruction and rollers mounted thereinand geared in connection so that one of said rolle'rs will turn throughtwo revolutions while the other is turning through but one, said rollersbeing of the same or substantially the same diameter and being providedwith teeth arranged in longitudinal and transverse rows, the rows ofteeth on the roller having the least number of revolutions being twicethe number of the rows of teeth on the other roller, whereby theoperation of the said teeth of said rollers is facilitated in theprocess of crushing or feeding the coal therethroughj and with this andother objects inview the invention consists in a device of the classspecified constructed as hereinafter described and claimed.

The invention is fully disclosed in'the following specification, ofwhich the accompanying drawings form a part, in which the separate partsof my improvement are designated by suitable reference characters ineachof the views, and in which Figure l is aplan view of my improvedcoalcrusher, the casing being shown in section; Fig. '2, a side viewthereof, and Fig. 3 a transverse vertical section on the line 3 3' ofFig. 1. g

In the practice of my invention I provide a suitable frame or casing 64,which isoblong and rectangular in form, andwhich in the form ofconstruction shown is supported by legs (4 In the form of constructionshown the frame or casing a comprises a bottom portion a and atopportion a but this frame or casing may be of any desired constructionand of any preferred form.

Mounted in the frame or casing a are two M, which rest on any suitablebase or supportrollers 5 and 0, which are in the form of constructionshown of the same transverse dlameter, and these rollers are geared inconnection at one end by means of gear-wheels Z2 and c ,v

the respective diameters of which are such that the roller 0 will turnthrough two revolutions, while the. rollerb will turn through but-onerevolution. The roller 6 is provided with a plurality of teeth 6arranged in longitudinal and transverse rows, and the roller 0 isprovided with a plurality of teeth 0 also arranged in longitudinal andtransverse rows, and the longitudinal rows of teeth 0 on the roller 0are one-half the number of the longitudinal rows of teeth 6 on theroller 6. The distance between the teeth 5 on the roller Z), both in thelongitudinal and transverserows,

is such that four of said teeth form a square,

as shown at 6 and the arrangement of the teeth 0 on the roller ois suchthat when the said rollers are turned the teeth 0 on the roller 0 willenter the spaces or squares o of the roller 6 and point directly towardthe centers of said spaces or squares when the teeth of the roller 0project horizontally toward the roller 5.

It will be understood that the coal is fed into the crusher in the usualmanner and by an; suitable means, and by reason of the arrangement ofteeth on the rollers 6 and c the coal is carried through or between saidrollers and crushed or broken into fine pieces or particles, thedimensions of which will depend on the arrangement of the teeth on therollers b and 0 or the spaces'between the same. This arrangement of theteeth onthe rollers o and c also facilitates the operation of forcingthe coal between the rollers and preventing the same from becomingpacked between the teeth tal plane and geared in connection so that oneof said rollers will revolve twice as fast as the other, each of saidrollers being providedwith teeth arranged in longitudinal and transverserows, the longitudinal rows of teeth on the roller which revolves mostrapidly being twice the number of those on the other roller,substantially as shown and described.

2. A coal-crusher, comprising asuitable frame or casing open at the topand bottom and two rollers mounted therein in the same horizontal planeand geared in connection so that one will revolve more rapidly than theother, each of said rollers being provided with teeth arranged inlongitudinal and transverse rows, the rows of teeth on the roller whichrevolves most rapidly being half those on the other roller, all of theteeth on each of the rollers being the same distance apart longitu-GEORGE \V. PERRY.

Witnesses:

H. K. Wns'roN, HORACE J. Wns'roN.

